Foreplay

Hmmm. Okay. Me and partner were having a fun time earlier. Then things got hot between us, so he started fingering me. Btw, I am 7 weeks pregnant. Then it was so intense, the way he fingered me, I felt a slight pain. So I asked him to stop. Then I saw his finger, it was covered in blood. I checked the bed and I bled. Is it normal? Did this happen to any of you? Is it just a scratch because the bleeding stopped immediately? Please help.